CLASSIFIED KEY TO INDEX. 17 
Petrology — Continued. Page 
Wisconsin 305 
Wyoming ;;<„; 
Classification 306 
List of rocks described 300 
Philippine Islands 314 
Physiographic geology 314 
Pleistocene (not relating to glacial deposits) 319 
Classification 319 
Correlation 319 
General 319 
Alaska 319 
Canada 319 
Atlantic Coastal Plain 319 
Cuba 320 
Great Lakes region 320 
Great Plains region 320 
Gulf States 320 
Jamaica 320 
Mexico 320 
Mississippi Valley regi< >n 320 
New England and New York 321 
Rocky Mountain region 321 
Sierra Nevada and Pacific Coast region 321 
Southwestern region 322 
Yucatan 322 
Porto Rico 322 
Rhode Island 322 
Silurian 322 
General 322 
Nomenclature . 322 
Classification 322 
Correlation 322 
Alaska 322 
Canada 322 
Appalachian region 323 
Great Basin region 324 
Great Lakes region 324 
Indian Territory 324 
Mississippi Valley region 324 
New England and New York 325 
Rocky Mountain region 325 
Sierra Nevada and Pacific Coast region 325 
South Carolina 325 
South Dakota 326 
Tennessee 327 
Tertiary 327 
General • 327 
Nomenclature 328 
Classification 328 
Correlation 328 
Alaska 328 
Canada 328 
Atlantic Coastal Plain 328 
Bull. 189—02—2 
